During closing arguments that began Monday, a prosecutor used an arsenal of evidence to paint Lonnie Franklin, an accused serial killer, as a monster who “shot and strangled women, many prostitutes, and dumped their bodies in alleys not far from his home” in south Los Angeles, reports CBS Local.

Deputy District Attorney Beth Silverman “displayed charts, diagrams, photos and DNA test results to throughout the 3-month-old trial to make the case” that Franklin was a cold-blooded killer hiding in plain sight, writes the news outlet:

“Ten young women,” Deputy District Attorney Beth Silverman said during closing arguments in Los Angeles Superior Court. “All of them cruelly murdered by that man.”

Franklin, 63, a former garbage collector who also worked as a mechanic for the Los Angeles Police Department, could face the death penalty if convicted of the slayings of a 15-year-old girl and nine young women. He has pleaded not guilty to murder, and to attempted murder in the case of a woman who survived.

Silverman spent hours discussing how ballistics tests showed that most of the women had been killed by the same gun, their bodies deposited in similar places and Franklin’s DNA was found on victims and the zip tie of the trash bag holding Peters’ body.

But Franklin’s attorney, Seymour Amster, said prosecutors had built an inferior case based on circumstantial evidence. If convicted of the charges, Franklin faces the death penalty.